Intermittent thread-cutting temple for looms



'Patented Dist. 12, 11926.: I

' LVINL. sronn, or PROVID N E;Rrr'onE'rsLAnn, assrsnonro Dani 312 cortisone rron, or OPEDA E; massacrrusnrrs; a conronarronor MA NE; A

.INTERMIT ENT. rrnnnangco rjrrite rEMrLE 01R mom's; 7

- Application flied-Jame Thisinvention relates to improvements in an intermittently operated-thread cutting temple for looms. 1' 1 a The object of the invention is to provide a simple and efiicient construction 'in which the thread cutting elements shall-be operated at the time ofreplenishment only for' 'a pre merits aftertheseverance of the filling? upon; replenishment and until the time ofth'e next:

1 tions of the operationof theilo'om. V

- cuttingin'strument'alitiesonly at and during V predetermined periods and'i'sapplicable' to.

determinedperiod, thus "savingqvearand tear, during the-remaining operatiod of the loom.

Various mechanisms haveheretoforeibeen provided for securing the" intermittent: 0151-: eration'of the thread cutting temple because the continued" op'eration'of the cutting'ele-i replenishment is entirely unnecessary v and wasteful. The present inventlonis designed-1 to effect this result means readily ,applied toexisting. constructions iand' by. mechanism which :is of simple .constructionand capable of gfu'nctioning efficiently notwithstanding the shockvand jar to Which it is subjected.

The object of the-invention is further to provide such a "mechanism which may be" timed tosecure any desirednumber of cutf ting movements after replenishment hastaken place in accordance with the character of the Work being'performedandlth-eficondi These, and V -other objects and. featuresof the invention will appear more fullyiromthe accompanying description,"andfdravvings and'will be particularly pointed out inthe claims. V g

.As the invention is concerned s'olelywitli the means for'securing the operation of the,

various forms of thread cutting "templesand will be readily understood bygthos'e skilled 1 'inthe art-{fit is only} necessary hereftofillus trate, and describe crtain'portiOnsofthe loom and n ordinary typei of thread cut, ting :templefsufiicientto disclose a preterred embodiment of the invention. In the drawings; Fig fl is a ,;v'iew in side, elevation of a portion of a loom athreadgvcutting tem le -and'a mechanism embodying theinventiou cutter shown in inoperative:

With the thread position a Fig. 2 1S a view -similar itotFig, the thread cutter shown in operativeposit on; {1- Fig. 3 'isa detail partially broken away! 1925. Serial K0 112 24 in frontelevation 0f apportion of themjecha .nism showniin Fig.1. H N v A portion'of 'the'trame '1 or the 100m, the

lay 2,; the contr'oller 'shaftB; and the templeand familiar construct-ion.

ionconvenience is herein illiisttated lias er;

h w-1 own the patent ha attire rearward end of; a shank? whicli jii's m1 unted for rearward. an'dior-ivard' move- Y ment in the stand. 'The forwardmovement' I Stimps'on," No. 1,366,03L'Ja1it1ary' 18,1921. Siich'dfl vice compri s em temple stand j 5{ mounted" on thebracket 4 andia-templehavinga head 16'- fixed cutter blad e, not shown, in the temple; f head anda movable cutter member 10 mounted ina'sl'ot in the temple head to h'ave -a" forward. and rearward-rocking movement of the usual charact'eni This movable cutter member at its rearvvard end is I provided with i Y Wardly; Themovem-ents of the movable'fcut' a-hook-sshaped blade l1 cooperatingwi'ththe' fixed'b lade to sever the fillin'g twh'enfthe' out ter member is moved forwardly and doWn-:

ter member aregivenxin the usual'manneri Y "A spring 12 connected at 'its upper end to the temple shank and at its lower lendf tbj a'. stud -13 ion the depending fhe'el' 1410i: the! movable cutterlmember actsto' give thereai'f-k ard,mo vemeiit,iimvhile the lay 2 'on' the 'beat-"" J .up engaging the heel liactstoj give-the'fori- 1 Ward movement. "Consequently under' usiial conditions the movable cutter. member' is" moved forwardly by the lay at: eachibeat-up:

and then "immediately, projected r'earwardly; by, the spring 12," thus "being inconstanto-p'a erationivvhile'the loomis' running. 'Butthis- 1 i mov-ement ofthe movablecutter member is required only when, and immediately after,1

replenishment hastaken place forutheipurposeqof'severing the fillingends left as a;

result of'the replenishing operation. 1 One or 'at', most but-afevv of the operations of the thread cutter? are required for this pun pose -a11d5the; present invention-is for the,

purpose of limitingfthe operation of; the" CIR movable thread cutter member so that its operation shall only takev place when thus required and for limited, predetermined periods. y

In the preferred construction illustrated a ratchet wheel is rotatably mounted on the temple. As a convenient means for thus mounting the ratchet wheel, a bracket 16 is secured by means of a set screw'l'i' to the temple shank 7 and d-ependstherefrom. At its lower end it is provided with a hub 18 :carrying a stud 19 on which rotatably mounted the ratchet wheel .15. p

A retractor in the form of a link 20 is connected to the movable cutter member and is engaged and moved by the ratchet wheel when rotated to draw the movable cutter member forward to inoperative position. This retractor has its connection with the movable cutter member by being pivoted, in the form shown, on the stud 1-3 at its rear fend and, engages the ratchet wheel by meairs of a slot 21 at its forward end fitting over a pin 22 extending laterally from the ratchet wheel. 1 V v v The. ratchet wheel is actuated to carry the pin 22 around counter-clockwise and thus to draw the movable cutter member forwardly to inoperativeposition by means of an 'actuatlng pawl carried and moved" by the movable cuttermember i'tselfn ,T his pawl 23 for that purpose is conveniently carried by themovable cutter member by being pivoted at 24 to the retractor 20 which in turn is carried by the movable cutter member. It willvthus be seen that when the movable cutt'er member is free to operate, it will be 'moved forward at each beat-up of the lay causing the pawl 23 to engage the ratchet wheel '15 and move the ratchet wheel one or more teeth at a time until the pin '22 has carried the r-etractor forward, and with it the movable cutter member, to a position where the lay. can no longer strike and move the heel l4. Reverse rotation of the ratchet wheel is prevented by asuitable detent pawl '25 engaging the ratchet wheel and herein shown as pivoted at 26 on the bracket 16 carried by the temple shank .7. V

WVhen' the pawls arenot in engagement with the ratchet wheel, the spring 12 acts to restore the movable cutter member toits rearward operative position "and in addition a spring 27 may be employed to assist in the reverse rotation of the ratchet wheel. This spring is mounted on the hub 18 of the bracket 16 and engages at one end the bracket and at the other end the ratchet wheel.

The engagment anddisengagement of the pawls with the ratchet wheel is controlled by a pawl lifter. In the construction illustrated, this 'pawl lifter is shown as a bar 28 having at its rearward end ail-arm 29 extending beneath pins 80 and 3 1projecting laterally from the pawls, 23 and 25, respectively. The pawl lifter is so mounted, in

the construction illustrated, as to have both a forward and .rearwardmovement and a vertical up and down movement. ,For this purpose the bar28 slides in brackets 32 on the temple stand and is provided with suitable cam surfaces 33 cooperating with said brackets. The rearward movement of the pawl lifter is limited by a pin 34: engaging the left-hand bracket and the forward move- .ment by the vertical portion 35 engaging the right-hand bracket.

' The movement of the pawl lifter to free the pawls 23 and 25 from the ratchet wheel and allow the movable cutter member to move to operative positionis preferably se 7 cured upon the call for filling. replenishment from the usual controller shaft 3. This shaft. rocks counter-clockw1se when replenishme'nt is called for and, in the construction illustrated, an arm 36 .is'mounted on this shaft, and a spring 37 connects the upper end ofthe -arm86 to the end of the pawl lifter 28 so that when replenishment'iscalled for and the-arm 36 swings to the left, the pawl lifter is drawn forwardly until the vertical portion 35 engages the right-handbracket 32. and then any further movement of the arm v86 is taken up by the spring 37. The

pawl lifter is .in either position without in-- terfering with the pro'per functioning of the "pawls. In Fig. 1 the pawls are shown in V engagement with the ratchet wheel. If new the entire temple" is carried forwardly by p the lay, the pawl studs 30 and 31 ride along or above the surface at "of the pawl lifter and still remain n engagement with the ratchet wheel; The stud 3O oftheactuatmg pawl also rides along or above this-surface while the pawl lifter is in this position and the ratchet wheel is being operated to retract the movable cutter member to its inoperative position. So also, asshownin Fig. 2, when the pawl lifter is in elevated position and the movable cutter member is functioning,'if bodily forward movement of the entire temple takes place, the studs 30 and 31 ride along on the surface lO while held disengaged from the ratchetwheel. V

The number of operations of the movable cutter member which takes place after it has moved intooperative position is deterto a. pin

- rcoaeai each forward movement of the movable cut ter member and, second, upon 'thetextent to which; reverse rotation of; the-ratchet .wheel takes place when the ,pawls' are disengaged by the pawl lifter. Thisextent of reverse rotation is adjusted, :in, this; invention, by

means of cooperating relatively: adjustable stops on the templeand-ratchet wheel. $111 the construction illustrated, oneqoif ithese 'stopsis shown as a pin42 secured in the ratchet wheel and extending laterally there of and the other as pin 43 which is set as required in one or the other of holes 44 in the hub 18; It is ,thus possible. to icon trol the number of =movements1of the mow able cutter memberto any numberreqnired' to. eifect the severance; of.thefifillingunder' thefparticula'r conditionsja trated will be apparent; from the descrip-f 'tion already given, Normally the "parts. standas shown in Fig. .1 with the movable;- 'cutter'member inv its retracted forward.in--. operative position. c When now the' cali' =f0r1 filling, replenishment occurs; and the Icon trollei rockshaft '3-..=rocl rs,zthe pawllifter 28 is draWnLtofthef:left and-jby the cam surfaces 33 is raised, thusflliftingboth' the 7 actuating pawl 23 and thei'detent' pawl 25,

from engagement with'the ratchet wheel, as

shown in Fig. 2, and immediately,'under the actuation of the springs 12 and 27, the movable cutter member moves rearwardly to-lts operative position and the ratchet Wheel rotates clockwise until the-j pin 42engages" the pin 48. As thelaynow heats up, it 'enf gages the'heel" l t of the .movable cutter member and operates it to give the cutting; movement in the usual manner. But innmediately the controller rockshaft 3-rotates in the opposite direction and the spring38 -moves the pawl lifter 28tothe right and the cam surfaces 33 force it downwardly, thus permitting the pawls 23 and 25 to be 'restored to cooperative engagement withthe ratchetwheel, The next forward movement of the movable cutter member that takes place causes the actuating paw123 to rotate; the ratchet wheel "and move the pin 22; The

' extent to which this pin moves is determined 7 vides a simple and eflicient type of mechaby the extent to which the pawl 231moves the ratchet wheel and the rotary position I of the pin 22 as determinedby. thestops 42 In any event, after one or more,

and 43. operations of the movable cutter member, the pin 22 will engage the end of the slot 21 in the retractor 20 and move the movable cutter member to its forward inoperative position. .1

It will thus be seen that the invention pro-,

nism which or may readily be embodied in existing loom structures as well as in new structures, and'which insures the "operation of thethreadcutting mechanism 'onlyatand when replenishment takes place.

Having thus .des'c'ribed the invention,- what is claimed asnew, and des red tolbe securedby LettersPatent, is:

1,. :An intermittent thread cutting temple 7 fortlooms. comprising amovable' cutter member receiving its r'orward cutting-movement from the lay, a spring acting to move the r i cutter member :rearwardly, a ratchet'wh'eel mounted on I the 1 temple, an actuating pawl carried and moved by the movablef cuttery member for rotating the ratchet wheel, are.

tractor connected to the movable cutteramem her and engaging and-moved by the ratchet V pwheelwhenrotate'd by thea'ctuating pawlt'o" The operation: of" the 'mechanism'illus-j' draw :the movable cuttermember forward to anddetent pawls, andmeans for, actuating the pawl" lifter upon the :call for filling 'replenishment to-lift the pawls from engage- "ment with theratchetwheel andpe rmit the movable cutter member to assume its rear-w ward operative position. I r

2. An intermittent thread cutting temple" for looms. comprising a movable cutter member receiving its forward, cutting movement from the lay, a spring acting tomove the,

-cutter member rearwardly, a'ratchet wheel mounted on the 1 temple, an actuating pawl carried and moved 7 by the movable cutter member for rotating {the ratchet wheel, la V ,retractOr connectedto the movable cutter member and engaging and moved by the ratchet wheel when'frotated by the actuating pawl to draw the movable cutter memberforward to inoperative position, axdetent V pawl to hold the ratchet wheel against reversefrotation, apawl lifter cooperating with the actuating and detect pawls," and means for momentarilyactuating. the pawl lifterat thetime of replenishment to lift the] v pawls from engagement with the ratchet wheel and permit thermovablc cutter menrberg to assume its rearward operative position and then to permitthe restoration of,

the pawls to cooperative engagement with the ratchet wheel. I

- 3. An intermittentthread cutting temple I for looms comprising the construction defined in claim 1, in whichthe retractor is pivotally connected to the movable cutter member and in which the actuating pawl is 'pivotally mounted on the retractor. I

4. An intermittent thread cutting temple for looms. comprising the construction defined in claim 1', in which the ratchet wheel is" provided with'a laterally projecting pin, the retractor is pivotally' connected to the movable cutter member and provided With a slot engaging said pin and in which the actuating pawl is pivotally mounted on the actuator.

5. An intermittent thread cutting temple for looms comprising the construction defined in claim 2, together with cooperating relativelyadjustable stops on the temple and ratchet Wheel to limit the reverse rotation of the ratchet wheel and consequently the nummovement from the lay, a spring acting to move thecutter member rearwardly, a ratchet wheel mounted on the temple, an actuating pawl carried and moved by the movable cutter member for rotating the ratchet wheel, a retractorconnected to thezmovable cutter. member and engaging and moved by the ratchet wheel when rotated by the actuatin-g pawl to draw the movable cutter member forward to inoperative position, a detent pawl on the temple to hold the ratchet wheel against reverse rotation, a pawl lifter 'having'an' arm extending beneath the actuating and detent pawls and mounted for longitudinal and vertical movement on the temple stand, means forgiving a forward andupward movement to the pawl lifter followed by a rearward and downward movement at the time of replenishment, thus first to lift the pawls from engagement with the ratchet wheel and then to permit their estoration to engagement with the ratchet wheel.

7.. An intermittent thread cutting temple for looms comprising the construction defined in claim 6, in which the arm of the pawl lifter is shaped to permit bodily forward and rearward movement of the pawls with the temple withoutmterfering with the required functioning. of the pawls when the pawl lifter is in either position. v

.8. An intermittent thread cutting temple for looms comprising-the construction de fined in claim 6 in which the pawl lifter is given its forward" and upward movement upon the call for filling replenishment and 'ts downward and rearward movement by a spring connecting the pawl lifter to the temple stand. l

In testimony whereof, I have signed my name to this specification.

MELVIN L. STONE. 

